Detection is compromised when a cognitive radio (CR) user experiences deep fading effect.
To detect the primary user (PU) more accurately in fading channels, CR users need to …

In a Cognitive radio network (CRN) the priority of radio frequency spectrum is assigned
between Primary User (PU) and Secondary User (SU) to improve the competence of …

The cognitive radio allows spectrum sharing between licensed users (primary users) and
many unlicensed users (secondary users). The secondary users are only allowed to use a …

In this paper, we consider the problem of spectrum sensing in cognitive radio, where
unlicensed (secondary) users are allowed to share the vacant frequency bands from the …

Spectrum sensing is a key function in cognitive radio network (CRN) to avoid harmful
interference with licensed users and identify the free spectrum to improve spectrum …

Cognitive Radio is a novel technology that can potentially improve the utilization efficiency of
the radio spectrum by opportunistically using the unused frequency bands. Spectrum …

In this paper, we propose a cooperative spectrum sensing scheme to maximize the detection
probability in cognitive radio systems. We first analytically derive a closed-form expression …

Problem statement: Cognitive radio is a candidate technology for more efficient spectrum
utilization systems based on opportunistic spectrum sharing. However, a common …

In this paper, we address the issue of cooperative spectrum sensing in cognitive radio
networks. Here relay stations are introduced in cognitive radio network. In the proposed …

Performance of cooperative spectrum sensing (CSS) has been assessed in presence of log-
normal shadowing. Cognitive radio (CR) users which employ energy detectors (EDs) are …